Dubmill is a settlement in the civil parish of Holme St. Cuthbert in Cumbria, United Kingdom.

The area around Dubmill has been settled since before the Roman occupation, as a Bronze Age sword believed to date back to 1100BC was discovered on nearby Salta Moss.

A series of milefortlets were placed along the coast beyond the western end of Hadrian's Wall to guard against coastal raids from across the Solway Firth.

[8] Dubmill is located on a stretch of coastline which was subject to raids across the Solway by the Scots even as late as the Tudor period.

In 1592, a man named William Osmotherly, who lived at Dumbill, had his home broken into and was kidnapped for ransom by Scottish raiders.

[9] Dubmill is situated on the B5300 coast road, and is served by a bus which, as of mid-2015, runs between Silloth-on-Solway in the north and Workington in the south.

[17] After new rock armour coastal defences were installed between Dubmill and Mawbray, the closed section of the road was able to re-open in June 2019.